Get other AV loh.
AVG-Antivirus ? <---- The one im using. Good. Fast. Doesn't slow down. (low scan rate)
Avira Antivirus ? <--Highest scan rate among AVG/Avast. But update sucks.
BitDefender 8.0 ?

No need antivirus also can. So long you surf LYN whole day, play 1 type of game for ur whole life. Log in/Log out Gmail/hotmail/yahoo mail/ . (Usin firefox+Site Advisor+)

If lidat, no need antivirus i tink.